Hylomus enghoffi ( Nguyen, Golovatch & Anichkin, 2005)

Nguyen, Anh D., Nguyen, Manh-Ha, Nguyen, Thu-Anh T. & Phung, Hong-Luong T., 2019, Review of Dragon Millipedes (Diplopoda, Polydesmida, Paradoxosomatidae) in the Fauna of Vietnam, with Descriptions of Three New Species, Zoological Studies 58 (14), pp. 1-31 : 7

Hylomus enghoffi ( Nguyen, Golovatch & Anichkin, 2005) ( Figs. 1 , 6−8 )

Desmoxytes enghoffi Nguyen, Golovatch & Anichkin, 2005: 256−257 , figs. 26−33.

Hylomus enghoffi: Srisonchai et al. 2018a: 10 .

Material examined: 1 male, 1 female (IEBR-30) Quang Binh Province, Phong Nha-Ke Bang National Park, secondary forest, July 2003, coll. Pham Duc Tien; 1 male, 2 females (IEBR-217) same locality, but limestone forest, 10−22 August 2011, coll. Anh D. Nguyen; 9 males, 1 female (IEBR-218) and (IEBR-Myr IPE5) same data as sample IEBR−217.

Diagnosis: The species can be distinguished from its congeners by the combination of the following characters: paraterga antler-shaped; metaterga with transverse rows of 2 + 2 and 1 + 1 setiferous spines; epiproct modified, with 2 + 2 non-setiferous knobs near tip; only male leg femur 7 inflated ( Figs. 6−7 ); postfemoral region of gonopod not extremely short; solenomere subfalcate; tip of lamina medialis with 2 apical lobules; spine z prominent ( Fig. 8 ).

Previous records: Quang Binh Province (Phong Nha - Ke Bang National Park) ( Nguyen et al. 2005).

Distribution: Only known from central Vietnam.

Figures

Fig. 1. Distribution of Hylomus species in mainland Vietnam. 1: Hoang Lien National Park (Sa Pa, Lao Cai Province); 2: Nam Xay Commune (Van Ban District, Lao Cai Province); 3: Duc Xuan Commune (Bac Quang District, Ha Giang Province); 4: Xuan Son National Park (Phu Tho Province); 5: Tam Dao (Vinh Phuc Province); 6: Cuc Phuong National Park (Ninh Binh Province); 7: Phong Nha – Ke Bang National Park (Quang Binh Province); 8: Lien Chieu District (Da Nang Province); 9: Ba Na National Park (Da Nang Province); 10: Lo Xo Pass (Kon Tum Province); 11: Ngoc Linh Mt. (Kon Tum Province); 12: Kon Chu Rang Natural Reserve (Gia Lai Province); 13: Buon Ho District (Dak Lak Province); 14: Hon Ba Mt. (Khanh Hoa Province); 15: Phan Rang (Ninh Thuan Province); 16: Cat Tien National Park (Dong Nai Province).

Fig. 6. Hylomus enghoffi (Nguyen, Golovatch & Anichkin, 2005) from Phong Nha – Ke Bang National Park. Habitus photo. No scale bars were inserted while taking photographs for this figure. This figure emphasises natural colouration.

Fig. 7. Hylomus enghoffi (Nguyen, Golovatch & Anichkin, 2005) from Phong Nha – Ke Bang National Park. Anterior part, dorsal view (A), lateral view (B). Middle part, dorsal view (C). Posterior part, lateral view (D), ventral view (E). Hypoproct (F). No scale bars were inserted while taking photographs for this figure. This figure emphasises colouration, shapes of paraterga (Pa), metaterga (Me), collum (Co), epiproct (Epi) and hypoproct (Hy).

Fig. 8. Hylomus enghoffi (Nguyen, Golovatch & Anichkin, 2005) from Phong Nha – Ke Bang National Park. Right gonopod, lateral view (A), mesal view (B).